Syngonium foreroanum Croat, sp. nov.
TYPE: Colombia, Choco, Municipio of San
Jose del Palmar, on a hill SW of the village, 1300 m, Forero, Gentry,Sugden
& Daly 3385 (COL-96613, holotype).
hemiepiphytica; petiolus 45-47 cm longus, usque ad 1/3 longitudinis
vaginatus; lamina tenuis, ovata, apice acuminata, lobo antico 17.5-20
cm longo, lobi posticis 10.5-15 cm longis, apice acutis obtuse,
sinu basali apice obtuso aut rotundato; venis basalibus ad marginem
confluentibus 1.21.5 cm; folia venis lateralibus utroque latere
3-4. Inflorescentia solitaria-; pedunculus 11-12 cm longus; spathae
tubus oblongus-ellipticus, 6.5 cm longus; spathae lamina 12 cm longa;
spadix parte feminea 2 cm longa, fusiformi, parte masculina 7 mm
diam., apice acuta.
creeper; stems 1.5 cm diam.; upper internodes ca. 1.5 cm long or
shorter; petioles 45-47 cm long, sheathed 15-17 cm at the base,
the sheath ca. 2 cm high near the base, weakly free-ending and acute
at the apex, the unsheathed part cylindrical, ca. 4 mm diam. on
drying; blades entire, ovate, abruptly acuminate or bluntly acute
at the apex, deeply lobed at the base, 28-31 cm long, 1921 cm wide,
drying chartaceous, matte, the anterior lobe 17.5-20 cm long; the
posterior lobes 10.5-15 cm long, directed somewhat outward, bluntly
acute at the apex; sinus rounded at the apex, 2.5-3.5 cm wide; primary
lateral veins 3-4 per side, arising from the midrib at 35-55' angle,
weakly curved to the collective vein; secondary and tertiary veins
distinct, flat; primary collective vein 2-4 mm from the margin,
moderately straight, basal veins usually 3, the posterior rib straight
to the tip of the posterior lobes, naked 12-15 mm at the base.
solitary (-); peduncles 11-12 cm long, ca. 4 mm diam. (dried); spathe
ca. 15 cm long; spathe tube ca. 6.5 cm long, ca. 1.6 cm diam., greenish;
spathe blade 4 cm wide, acuminate (-) at the apex, moderately thin,
at least sometimes weakly purplish- spotted throughout; spadix slender,
12 cm long; pistillate portion of the spadix fusiform, ca. 2 cm
long, 7 mm diam.; sterile staminate portion of the spadix conspicuously
constricted at the base, ca. 2.5 cm long, gradually broadened onto
the fertile portion, the sterile staminate flowers broadest in the
direction of the axis, the apex 3-3.5 mm long, 1.5 mm broad, the
fertile staminate portion ca. 7.5 cm long, 7 mm diam., narrowly
acute at the apex, the flowers 2 mm long, 1.5-2.5 mm diam., irregularly
shaped, the margin irregularly scalloped.
Infructescences unknown. Fig. 8.
Syngonium foreroanum is known for certain only from the type
specimen. It was collected at 1300 m elevation in an area that is
probably premontane wet forest. Another specimen collected at sea
level (Forero et al. 4367) in the delta of the Rio San Juan in southern
Choco might also be this species. It is described as an epiphyte
but looks more like a Xanthosoma. It differs principally
in having an ovate-triangular blade with narrowly acute lobes.
foreroanum is most similar to S.
crassifolium but differs from it by its smaller leaves,
fewer primary lateral veins, and more delicate inflorescences.
COLOMBIA: CHoco: S of Municipio of San Jose, Forero et al. 3385